Muller, Kal, author
Periplus,, 1992
Buku Referensi
Irwin, Graham
Kuala Lumpur Dewa Bahasa dan Pustaka 1986
Buku Teks
Tarling, Peter N.
Buku Teks
Brunei Darussalam National Chamber of Commerce and Industry
Brunei Sdn and Forward Media Sdn Bhd, 2002
Buku Referensi
Tarling, Peter N.
Buku Teks